Attachment 146279 Details for Bug 288357 – Sample program

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Sample program

SlowOpeningComboBoxCellEditor.java (text/x-java), 4.77 KB, created by Eleanor Joslin

on 2009-09-02 09:44:11 EDT

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Description:

Filename:

MIME Type:

Creator: Eleanor Joslin

Created: 2009-09-02 09:44:11 EDT

Size: 4.77 KB

patch

obsolete

>import java.util.Arrays;
>import java.util.List;
>
>import org.eclipse.jface.dialogs.Dialog;
>import org.eclipse.jface.dialogs.IDialogConstants;
>import org.eclipse.jface.viewers.ArrayContentProvider;
>import org.eclipse.jface.viewers.CellEditor;
>import org.eclipse.jface.viewers.ComboBoxCellEditor;
>import org.eclipse.jface.viewers.ICellModifier;
>import org.eclipse.jface.viewers.LabelProvider;
>import org.eclipse.jface.viewers.TableViewer;
>import org.eclipse.jface.window.Window;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.layout.GridData;
>import org.eclipse.swt.layout.RowLayout;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Control;
>import org.eclipse.swt.widgets.Shell;
>
>
>/**
> * A window that launches a dialog containing a table with an editable cell.
> * It takes 2 seconds for the cell editor to appear.  If the dialog is closed
> * during that time, an SWTException occurs.
> *
> * The dialog and window are both needed so that the SWT event loop continues
> * to run after the dialog is closed.  The {@link ComboBoxCellEditor} also
> * needs to be using the DROP_DOWN_ON_MOUSE_ACTIVATION style so that the
> * drop-down list is made visible as soon as the cell editor is activated.
> *
> * @author Eleanor Joslin (ejj@corefiling.com)
> */
>public class SlowOpeningComboBoxCellEditor extends Window {
>
>  /**
>   * Dialog containing a table with an editable cell.
>   * It takes 2 seconds before the combo box in the cell editor pops up.
>   * Closing the dialog during that time triggers an error.
>   */
>  private static class PopupDialog extends Dialog {
>
>    private static final int SLEEP_INTERVAL_MILLIS = 2000;
>
>    private static final List<String> CHOICES = Arrays.asList("Apples", "Pears", "Plums", "Cherries");
>
>    private final StringHolder _element = new StringHolder();
>
>    private TableViewer _table;
>
>    private final ComboBoxCellEditor _cellEditor = new ComboBoxCellEditor();
>
>    private final ICellModifier _cellModifier = new ICellModifier() {
>
>      public void modify(final Object element, final String property, final Object value) {
>        _element.setString(CHOICES.get((Integer) value));
>        _table.refresh();
>      }
>
>      public Object getValue(final Object element, final String property) {
>        return CHOICES.indexOf(_element.getString());
>      }
>
>      public boolean canModify(final Object element, final String property) {
>        try {
>          Thread.sleep(SLEEP_INTERVAL_MILLIS);
>        }
>        catch (InterruptedException e) {
>        }
>        _cellEditor.setItems(CHOICES.toArray(new String[CHOICES.size()]));
>        return true;
>      }
>    };
>
>    public PopupDialog(final Shell parentShell) {
>      super(parentShell);
>    }
>
>    @Override
>    protected Control createDialogArea(final Composite parent) {
>      _table = new TableViewer(parent);
>      _table.setColumnProperties(new String[] {"Only one column"});
>      _table.setCellEditors(new CellEditor[] {_cellEditor });
>      _table.setCellModifier(_cellModifier);
>      _table.setContentProvider(new ArrayContentProvider());
>      _table.setLabelProvider(new LabelProvider());
>      _table.setInput(new Object[] {_element});
>
>      _table.getTable().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
>      _cellEditor.setStyle(SWT.READ_ONLY);
>      _cellEditor.setActivationStyle(ComboBoxCellEditor.DROP_DOWN_ON_MOUSE_ACTIVATION);
>      _cellEditor.create(_table.getTable());
>
>      return _table.getControl();
>    }
>
>    @Override
>    protected void createButtonsForButtonBar(final Composite parent) {
>      createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
>    }
>  }
>
>  /**
>   * Element to show in the table.
>   */
>  private static class StringHolder {
>
>    private String _string = "Apples";
>
>    public void setString(final String string) {
>      _string = string;
>    }
>
>    public String getString() {
>      return _string;
>    }
>
>    @Override
>    public String toString() {
>      return _string;
>    }
>  }
>
>  public SlowOpeningComboBoxCellEditor() {
>    super(new Shell());
>    setBlockOnOpen(true);
>  }
>
>  @Override
>  protected Control createContents(final Composite parent) {
>    Composite composite = new Composite(parent, SWT.NONE);
>    composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
>    composite.setLayout(new RowLayout());
>
>    Button button = new Button(composite, SWT.PUSH);
>    button.setText("Open Dialog");
>    button.addSelectionListener(new SelectionAdapter() {
>      @Override
>      public void widgetSelected(final SelectionEvent e) {
>        new PopupDialog(getShell()).open();
>      }
>    });
>
>    return composite;
>  }
>
>  public static void main(final String[] args) {
>    new SlowOpeningComboBoxCellEditor().open();
>  }
>}
>

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Attachments on bug 288357: 146279